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This compact, single-pole thermal circuit breaker from E-T-A, part number 1170-21-25A, is designed for reliable protection in extra low voltage wiring systems found in vehicles and marine craft. It incorporates a push-to-reset actuator and a snap-action mechanism, offering both circuit protection and manual release.
The breaker has a current rating of 25A and a voltage rating of 48V DC, with a maximum operating voltage of 58V DC. It is built for durability, with a typical life of 6,000 operations at rated current under specific conditions. The device meets Type III standards according to SAE J 553.
Environmental and mechanical robustness are key features, with an operating temperature range of -40°C to 85°C, IP40 protection for the operating area, and resistance to vibration, shock, and corrosion. It is designed for base mounting with screw terminals.
Key specifications include an interrupting capacity of 2000A and compliance with RoHS3 standards. The 1170 series offers a compact design with blade terminals suitable for automotive fuse blocks.
The circuit breaker is rated for 48V DC nominal (58V DC max) and 240V AC.
It is a base mount circuit breaker with screw terminals.
The datasheet specifies -40 to 85°C, while the manufacturer page specifies -30 to 60°C.
The current rating is 25A.
The interrupting capacity is 2000A at 48V DC per ISO 10924.
The actuator is push-to-reset.